LevelDB-course-Lab

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costan d177a0263c Replace port_posix with port_stdcxx. The porting layer implements threading primitives: atomic pointers, condition variables, mutexes, thread-safe initialization. These are all specified in C++11, so the reference open source port implementation can become platform-independent. The porting layer will remain in place to allow the use of other implementations with more features, such as the built-in deadlock detection in abseil's Mutex. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=193245934			pirms 6 gadiem
..
win	reverting disastrous MOE commit, returning to r21	删除	pirms 13 gadiem
README	Replace port_posix with port_stdcxx.		pirms 6 gadiem
atomic_pointer.h	Take <atomic> for granted in port/atomic_pointer.h.		pirms 6 gadiem
port.h	Replace port_posix with port_stdcxx.		pirms 6 gadiem
port_config.h.in	Take <atomic> for granted in port/atomic_pointer.h.		pirms 6 gadiem
port_example.h	Remove extern from function declarations.		pirms 6 gadiem
port_stdcxx.h	Replace port_posix with port_stdcxx.		pirms 6 gadiem
thread_annotations.h	Enable thread safety annotations in open source version.		pirms 6 gadiem

README

This directory contains interfaces and implementations that isolate the
rest of the package from platform details.

Code in the rest of the package includes "port.h" from this directory.
"port.h" in turn includes a platform specific "port_<platform>.h" file
that provides the platform specific implementation.

See port_stdcxx.h for an example of what must be provided in a platform
specific header file.